Admirals's Ghost by N. B. Vanyoos

From Los Angeles drug dealer to hero of an alien world, the Universe must have a sense of humor. Tyler Jensen, an earthling lost in the cosmos, struggles to understand the technologically advanced world whose hero he has inadvertently become. Posing as the Supreme Commander of the planet’s fleet, Tyler must quickly learn the murky alliances of the military to succeed against their neighboring enemy. Will Tyler’s naiveté doom the warring world or can he navigate the political trappings of the Admiral’s world to conquer another?